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Liquid oxygen has a clear cyan color and is strongly paramagnetic: it can be suspended between the poles of a powerful horseshoe magnet. [2] Liquid oxygen has a density of 1.141 kg/L (1.141 g/ml), slightly denser than liquid water, and is cryogenic with a freezing point of 54.36 K (−218.79 °C; −361.82 °F) and a boiling point of 90.19 K (−182.96 °C; −297.33 °F) at 1 bar (14.5 psi).
Tetraoxygen was first predicted in 1924 by Gilbert N. Lewis, who proposed it as an explanation for the failure of liquid oxygen to obey Curie's law. [1] Though not entirely inaccurate, computer simulations indicate that although there are no stable O 4 molecules in liquid oxygen, O 2 molecules do tend to associate in pairs with antiparallel spins, forming transient O 4 units. [2]
Solid oxygen O 2, like liquid oxygen, is a clear substance with a light sky-blue color caused by absorption in the red part of the visible light spectrum. Oxygen molecules have attracted attention because of the relationship between the molecular magnetization and crystal structures, electronic structures, and superconductivity.
Liquid oxygen is so magnetic that, in laboratory demonstrations, a bridge of liquid oxygen may be supported against its own weight between the poles of a powerful magnet. [37] [c] Singlet oxygen is a name given to several higher-energy species of molecular O 2 in which all the electron spins are paired.
X-ray Crystal structure of the Mn 4 O 5 Ca core of the oxygen evolving complex of Photosystem II at a resolution of 1.9 Å. [1] Water oxidation catalysis (WOC) is the acceleration (catalysis) of the conversion of water into oxygen and protons: 2 H 2 O → 4 H + + 4 e − + O 2. Many catalysts are effective, both homogeneous catalysts and ...
Physics and Chemistry of Liquids is a peer-reviewed scientific journal that publishes experimental and theoretical research articles focused on the science of the liquid state. The editors-in-chief are N. H. March and G. G. N. Angilella. According to the Journal Citation Reports, the journal has a 2011 impact factor of 0.603. [1]
[1] [13] [14] Many different versions of the SAFT models have been proposed, but all use the same chain and association terms derived by Chapman et al. [2] [13] [15] One of the first SAFT papers (1990) titled "New reference equation of state for associating liquids" by Walter G. Chapman, Keith Gubbins, George Jackson, and Maciej Radosz, [2] was ...
Molecules is a peer-reviewed open access scientific journal that focuses on all aspects of chemistry and materials science. It was established in March 1996 and is published monthly by MDPI . From 1997 to 2001, Molbank was published as a section of the journal, before splitting into its own journal.